20200214-PREX2-Analysis

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Logistic information

Meeting room at JLab: CC F324-325

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Agenda

Analysis projects

  1. Yufan : Double Difference of BCM [HAPLOG]
    • YC: Apply cuts on main detector RMS, three runs have large RMS
    • TY: Run 3561 is a single arm run and blinder fails a few events and causes large RMS.
    • KP: Analog BCMs look good seperatly, how can double-difference between them is bad? YC: will think about it.
    • KP: looks like digtial downstream BCM breaks most of double differences.
    • YC: average error bar looks better after cut. KP: what is the average of dd error ? YC: just averaging over error.
    • YC: seperate data set for digital BCM using the same receiver.
    • YC: in table without dgcut, avg is average from p0-fit with error bars
    • CP: You should take out the DOF in your averages weighting
    • YC: I didn't use Draw command for weighted. KP: where did you put weighting? YC: I used TGraph
    • KP: You have to show the data or plot. The formula is incorrect. TGraph seems to miss proper weighting.
  2. Devika : BPM resolution from regression [HAPLOG]
    • DP: I used the regression rms and slopes to solve resolution.
    • KP: You should use the covariance from different BPMs. Lets discuss it offline
    • CP: cavity BPM resolution might be off-scale, we don't know the calibration scale yet.
    • KP: I would interpolate 4c from 4a and 4e for BPM scale calibration.
  3. Tao:
    • partial respin statistics, comparing corrected from dithering and regression [HAPLOG]
    • TY: 1) check rootfiles output with runlist; 2) Needs to fix dithering corrector maps
    • KP: We need to think about other BPM for corrections
    • KP: How many runs are missing?
    • RR: Almost complete. We are putting them into tape. Some rootfiles disappeared in volatile
    • RR: If you want to update event cuts, we should wait.
    • KP: We should go through these plots at some point.
    • KP: for Null asymmetry, you should balance slugs for IN/OUT state, but for grand averaging, you should include all the slugs; TY: I will update pitts definition.

PREX Respin

  1. Robert: respin update


Present

  • JLab: Tao Y, Weibin Z, Ryan R
  • Phone: Cameron C, Caryn P, Devi A, Devika B, Iris H, Kent P, Victoria O, Yufan C. Silviu CD, Robert R, Amali P

Excused